Gas lighting and extinguishing apparatus.



D. CARTER. GAS LIGHTING AND EXTINGUISHING APPARATUS.

APPLICATION FILED MAR. 3|, 1917. 1,269,049, Patented June 11, 1918,

2 SHEETS-SHEET I.

D. CARTER. GAS LIGHTING AND EXTINGUISHING APPARATUS.

, APPUCATION FILED MAR. 3|, IQIT- v 1,269,049. Patented June 11, 1918.4

2 SHEETSSHEET 2- DANIEL CARTER, or monon'ro, OJNZIilifiIQJCAiIlXQIiJh, liss ononor qnn-nnnr rogntins- 12. 1a, Mcnmcnnnp n nn tqizrn ns'ivmnnrr ntnj epqin on,rt:,o'ncnvTo; ohm-p 1 we nie GA? LIGHTING ,ANPZEXTINQWSEINQ emanate Application fiied Marchgtil, 1817. Serial-N0: 1595003.

To all whomit may concern:

Be it known that I, DANIEL GAM a sub,- ject of the Kin of. Great;Brit in, residin atthe city ofToronto, in the countiyjofixork and Province of Ontario, Dominion 0mm ada, have inventedcertain new and useful Improvements in- Gas Lighting andExtin: guishing Apparatus; and I-a hereloy declare thatthe following is a full,c1ear,fan 1exact descriptionof thesame.

Thisinvention relates to;certai.n 116W and usefulimproven ents in gas, lighting andegitil iguishing apparatus, comprising a main gas burner, a gas-pipe leading thereto, and a spring-closed stop cock controlling the flow of gas'through' the gas-pipe; to the burner, anditflrelates more particularly toa therinostatically-actuated, detent, whiehzim niediately becomes operative, and remains so, whenthe gas at, theburneris'ignited," to hold the stop cock in openposition; which remains inoperative when the gasv fails to ignite, and which automatically becoinesjin operative and releases the stopcock when; the gas is intentionally or ina dvertent ly v extinguished, so that the stop cock, may auto Inatically turn to closed positionundenthe influence of, the closing spring; the object ofjtheinvention being toat least minimize, ifniot, entirely eliminate, the risk of; accir dent resulting from a dischargefinto the at mosphere of unburned hydroGafrbonfgas, should it fail to ignite, or become ext-in guished, withthe stop cockopen.

In the drawings Figure 1, is afragmentary elevationof the as Fig, 2, is, a similar view, looking parts frorn the opposite sideto that shown in Fig. 1,;

Fig. 3, is a detail view of the stop cock; and detent plate;

Fig. 4, is a detail view of the actuating lever, by which 'the stop cook is turnedto openposition, and the detent is released for the, return of, the stopcock to, closedfposion;

actuating lever; I

Fig. 6, is aside elevation of thethermot t ed tent;

lighting and extinguishing apparatus; at, the,

Fig. 5, 1s an elevation of, the stop cock and;

Fig. 7 is a frontelevation of the same Fig. 8, is a lan viewofthe.bracketshown in Figs. fiend 7 Fig,.=9,,. is detailnview of, the.thermostatic spring; on a la'rger scale than the preceding views, showing the contractionv of the spring, when: cold, to exert "a pressure i upon the .de: te'ntlever and-hold thedetent dog out of op} erfati've relation with the stopcock'detent "and showing, in dotted lines, its expansion, when. heated; to relieve the. lever of, such: pressure Ba set- 6. 2

and {p m t o the mo ment ofi he: detent og, into: p ativ r latior with he top cock detent,' glil,zFig. 10 is a. detail .view of h adiu able bracketoe. he. dete tj: evel: L ke hQI' QfiQ SOL ef e rferi tofl ke parts throughou he pe ifica ionanddmw: lngs. I i ir pre nts he m i ga burner, nthe gas-pip e ing. her to, i the, p cock ontrollin he.fl0w of. ga through hegas: pipe. f ti p p and he pilotbu nen or gn tiiiglthe asa themain burner;

As 'shown in FigsJl, and 2, the stop; cool; is ex nd d b y d, b th es ofl e; a ing ft an s p ovided none ded he casin i h' anl' rm. wild; 0mm; th rf id fithe as ngh, detentnla ely havi 5a detent tooth y,'the arm 9 and detentpate yhe; nsm v lewith hestepl c In p xtaposlt on to the d tent platen. is, detes e. y ermin part; It de st eve ule umed; t s me. pr nriete pert qf h ea -fi tur a d. ex end hgitq he iein ty f h rner e top. ook. s' .1 g;.. l? he; pi ot 5 wn n. lls-. he 116.? a? fi lcrumed to a. stud b proj ecting fr om a bracket nte; p th. fif hsdeteet' bethi the th e pa s o h l l erme t tiei er eeiif;

thermostatic spring 7' is expanded, so that when-the stop cock is turned to open position,ithe detent dog 3 will engage the detent tooth y and hold the stop cock against closin movement while the gas isignited.

' Sli' able on the lower end of the pilot pipe,

is a collar f, to which is attached a bracket 9' slotted at h for the lever a passing through it, the dimensions of the slot 71," being suflicient to permit of the rocking move ment of the lever as it turns on its fulcrum.

The lower end i of the lever 0/ is tapered, and is engaged by the thermostatic spring j riveted to the bracket 9 in the vicinity of the burner a.

As shown in full lines in Fig. 9, the thermostatic spring j" is of a curved shape, with the free end of the are engaging the tapered end of the lever, and, when cold, exerting a pressure upon the lever .7) sufficient to throw. thedet'ent'dog 3 out of the path of the-detent tooth 1 so' that the stop cock will be free to close.

When the gas is ignited, either at the pilot or main burner, the heat therefrom willcxpand'the thermostatic spring y', asshown in dotted lines in'Fig. 9, which, as a result of such expansion, relieves the tapered end of'the lever a of its pressure, and enables the tension spring d to throw the detent dog 3 into the path of the detent tooth y, so that if the stop cock is open, the detent tooth y Will remain engaged with it, or if the stop cock is closed, it will be positioned to engage with the detent tooth y when the stop cock is manually opened.

7 Loosely mounted on, and rotatable independently of, the stop cock 0*, is a hub a, movable laterally toward and away from the detent plate y, the hub 2 having a lever arm .2, to which is attached a pull chain or cord 2 by which the stop cock may be manually actuated.

Forming part of the hub z, is an ofiset a normally engaging the detent dog y, and maintained in contact therewith by a tension spring a'Qwhich presses the hub a into contact'with the detent plate 3 for that purpose, and returns the hub and arm to their initial position when the strain on the pull chain or cord is released.

When the pull chain or cord is strained, the arm .2 and'hub .2 are turned from the position shown in full lines in Fig. 1, to the position shown in dotted lines in the same figure. This turning movement of the arm brings an offset e on the hub 2 into engagement with a pin 6" on the detent plate 1 and turns the detent plate and stop cock in unison with the hub 2 until the stop cock is fully opened and the detent tooth y positioned tobe engaged by the detent dog y.

If the pilot lightand burner flame, or either of them, is ignited, the heat therefrom will expand the thermostatic spring j and permit of the tension spring cl moving the detent dog y into position to engage the detent tooth y, and remain engaged therewith while the gas at the burner or pilot remains ignited.

When the strain on the pull chain is released, the arm 2" and hub a return to their normal position under the influence of the tension spring a, the olfset 2, during such return, clearing the detent dog y which, as shown in Fig. 7, has an inclined side g in the path of the offset, so that when the lever and hub reverse their movement under the influence of the tension spring a", the engagement of this offset 2 with the inclined side g of the detent dog will press the hub laterally from the detent plate and enable the ofi'set 2 to clear the detent dog for the completion of its return movement.

When the arm 2 and hub e have returned to their initial position and the ofiset is clear of the detent dog, the tension spring a will press the hub 2 again into contact with the detent plate, which brings the offset .2" again into operative relation with the detent dog.

When it is desired to close the stop cook, the pull chain is strained until the arm .2 and hub z are turned from the position shown in full lines partly to the position shown in dotted lines, in Fig. 1.

-Duringthis movement, the offset 2 engages the detent dog 3 and presses it away from the detent tooth y, allowing the stop cock to start its closing movement under the influence of the tension spring g, which is connected to an arm 9 projecting from the arm 9 and to the casing 7, there being suliicient lost motion between the pin 2 and ofl sets to permit of the detent tooth 3 pass ingclear of the detent dog y while the detent dog is pressed out of its operative position by the offset 2.

' When the strain on the pull chain is released, the tension spring a restores the hub e and arm .2 to their initial position, and the detent dog g/ and detent lever a are restored to operative relationwith the detent tooth 3 should the thermostatic spring j be heated, but, if the thermostatic spring is cold, it will engage the tapered end of the lever a and hold the detent dog out thermostatic spring remains expanded, such expansion existing while the gas at the burner or pilot remains ignited, and-that when the thermostatic spring is contracted, it Will exert a pressure on thelcorrespondi ng end ofzthe lever ato force the detent dog out of the path of the detenttooth, so that the stop cock will be free t0. move to; closed position, this. movement being automatically and instantaneously effected by the spring 9.

It will also be ascertained that by means of a construction similar to that previously described, it is possible to minimize, if not entirely eliminate, the danger resulting from a failure to ignite the gas when the stop cock is opened, and the danger resulting from the intentional or inadvertent extinguishing of the flame with the stop cock open, and it will be understood that various alterations may be made in the structural details above described, without departing from the principle of the invention.

Having thus fully described the nature of my invention, what I claim as new and desire to secure by Letters Patent, is

1. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a spring-closed stop cock therefor, a lever to effect the opening movement of the stop cock and having a return movement independently thereof, detent means holding the stop cock in open position when the gas is ignited, and thermostatic means rendering the detent means inoperative when the gas fails to ignite and when the flame has been extinguished, the detent means causing a lateral movement of the lever when turned to fully open the valve to enable the lever to return to its normal position independently of the stop cock, and being rendered inoperative by a partial movement of the lever.

2. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a spring-closed stop cock therefor, a thermostatically-actuated detent, holding the stop cock in open position when the gas is ignited, and inoperative when the gas fails to ignite and when the gas is intentionally or inadvertantly extinguished, and a lever to open the stop cock when turned in the open-' ing direction, said lever being returnable to a normal position independently of the stop cock.

3. In a gas lighting and extinguishing ap paratus, the combination of a gas burner, a spring-closed stop cock therefor, a thermostatically-actuated detent, holding the stop cock in open position when the gas is ignited, inoperative when the gas fails to ignite and when the gas is intentionally or imidvertently extinguished, and a lever to open the stop cock when turned in the opening direction, a partial movement of the lever rendering the detent inoperative, and

the detent on a complete operation of the lever causing the lateral movement ofthe lever for its return to a normal position independently ofthe stop cock.

4. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a spring-closedstop cock therefor, a thermostatic "detent holding the stop cock in open position, alaterally-movable rotatable lever for turning the sto'p cock to open position, returnable to a normal position independently of the stop cock, and means to cause the lateral movement of the leVer to clear the thermostatic detent.

5. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a stop cock therefor, a lever, a clutch to cause the united movement of the stop cock and the lever when operated to turn the stop cock to open position, said lever having a limited lateral movement, a thermostatic detent holding the stop cock in open position when the gas is ignited and being inoperative when the gas fails to ignite and when the gas has been extinguished, the thermostatic detent having an inclined side to engage with, and cause the lateral movement of, the lever when turned to fully open the stop cock for its return to normal position.

6. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a stop cock therefor, a lever, a clutch to cause the united movement of the stop cock and the lever when operated to turn the stop cock to open position, said lever having a limited lateral movement, a thermostatic detent holding the stop cock in open position when the gas is ignited and being inoperative when the gas fails to ignite and when the gas has been extinguished, the thermostatic detent having an inclined side to engage with, and cause the lateral movement of, the lever when turned to fully open the stop cock for its return to normal position, a partial movement of the lever rendering the thermostatic detent inoperative.

7. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a spring-closed stop cock therefor, a thermostatic detent to hold the stop -cock in its open position when the gas is ignited, being inoperative when the gas fails to ignite and when the flame has been extinguisl ed, an oscillating lever having a clutch to stop cock to open position, said w:- turning to a starting position indepidently of the stop cock, said lever having a limited lateral movement, and means to cause the lateral movement of the lever to clear the detent as it returns to a starting position.

8. In a gas lighting and extinguishing apparatus, the combination of a gas burner, a spring-closed stop cock therefor, a detent plate mounted to turn with the stop cook, to cause the lateral movement of the lever a lever loosely mounted on the stop cock for its return to normal position.

having limited lateral movement, a thermo- Toronto, March 3rd, 1917.

statio detent to hold the stop cock in open DANIEL CARTER posltlon When the gas is ignited, belng 1noperative when the gas fails to ignite and Signed in the presence of- When the Home has been extinguished, said EDWARD V. BERNs'rEIN,

thermostatic detent having an inclined side CHAS. H. RICHES;

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

